Ok. I started my period Monday May 15,2012, i ended my period the 19th. me and my boyfriend and sex this weekend. then went through the week just fine the weekend of may 25-27 we had sex again unprotected. but on friday i missed my birth control and got up on saturday and took them then. then monday i noticed i was spotting lightly and the same on tuesday. but to day wednesday may 30 2012 i went to the bathroom and i had brown with a little red mixed blood in my underwear. been having some slight cramps today but they come and go. Does this mean i could be pregnant????? Help i need feedback fast... Thanks..